Performance
· 25 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
2.75 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.85 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
102 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.77 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
5.32 s
Page Load Progression
DJS Execution CostAction2153ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://ratemyscene.com/ | 882ms | 48ms | 58ms | 1st |
| https://ratemyscene.com/_next/static/chunks/19tzvvdmjuk-1.js | 618ms | 585ms | 26ms | 1st |
| Unattributable | 556ms | 29ms | 0ms | 1st |
| https://ratemyscene.com/_next/static/chunks/3uffv3gbundnd.js | 97ms | 70ms | 16ms | 1st |
DHTTP CachingActionno-store (uncacheable)FIX
private, no-cache, no-store, max-age=0, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
| no-cache | — | Cache but always revalidate first |
| no-store | — | Never cache this response |
| max-age | 0 | Cache for 0 seconds |
| must-revalidate | — | Must recheck with server after expiry |
BThird-Party Impact42% third-party, 0 ms blockingREVIEW
BResource Hints6 hints, 0 missing preconnectsREVIEW
Current Resource Hints
6 resource hints configured
Fonts are always fetched as crossorigin=anonymous; a preload without the attribute creates a different cache key, so the browser refetches when the actual font request happens. Sample: /_next/static/media/797e433ab948586e-s.p.0r6juujl39pe6.woff2, /_next/static/media/caa3a2e1cccd8315-s.p.0wgildi0cnwt9.woff2. Add `crossorigin` (or `crossorigin="anonymous"`) to each preload.
Performance issues directly impact user engagement and conversion rates.
preconnect already does the DNS lookup; adding dns-prefetch to the same origin is at best a no-op. Sample: https://pub-8ac7b8e40d104e4c9fce09f91afb8244.r2.dev. Remove the redundant dns-prefetch entries.
Performance issues directly impact user engagement and conversion rates.
The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: https://pub-8ac7b8e40d104e4c9fce09f91afb8244.r2.dev (dns-prefetch+preconnect).
Performance issues directly impact user engagement and conversion rates.
BCompression AlgorithmMain response uses gzip; brotli would be ~20% smallerREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
APage Weight Budget896 KB transferred, 42 requestsPASS
A+Text CompressionAll text resources are compressedPASS
A+Image Optimization16 images, 0 KB saveablePASS
A+Font Loading2 fonts (51 KB)PASS
Web fonts
2
51 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
Optimization checklist
- Preload critical fonts (priority=high)
- Use woff2 format for all fonts
- Set font-display to swap, optional, or fallback
- Subset large fonts (≤100 KB each)
A+JS Bundles11 scripts, 28 KB unusedPASS
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://ratemyscene.com/_next/static/chunks/19tzvvdmjuk-1.js | 69 KB | 28 KB (40%) | ✓ | 1st |
| https://analytics.ratemyscene.com/script.js | 2 KB | — | ✓ | 3rd |
| https://ratemyscene.com/_next/static/chunks/2iho8jepmwwua.js | 2 KB | — | ✓ | 1st |
| https://ratemyscene.com/_next/static/chunks/29apvbdt3lgnr.js | 9 KB | — | ✓ | 1st |
| https://ratemyscene.com/_next/static/chunks/3uffv3gbundnd.js | 37 KB | — | ✓ | 1st |
| https://ratemyscene.com/_next/static/chunks/27jktro2p5rq9.js | 9 KB | — | ✓ | 1st |
| https://ratemyscene.com/_next/static/chunks/turbopack-2ghh648aegm68.js | 4 KB | — | ✓ | 1st |
| https://ratemyscene.com/_next/static/chunks/1867uhxhqh89h.js | 11 KB | — | ✓ | 1st |
| https://ratemyscene.com/_next/static/chunks/14mrh2-p_w84d.js | 13 KB | — | ✓ | 1st |
| https://ratemyscene.com/_next/static/chunks/1aau8okiep24-.js | 8 KB | — | ✓ | 1st |
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML uses no-store -- correct for sensitive/dynamic contentPASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
APage Weight Inventory42 resources · 896 KB · 28 KB savings availablePASS
~27.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 42 resources | 896.4 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
AJavaScript Blocking1 JS blocking issue(s) detectedPASS
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
Network Waterfall42 requests over 2237msINFO
Image Optimization40 images, 69 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
40
Total Size
69 KB